TF-1810 Add StoreDetailedEmailToCacheInteractor to store detailed email to cache

(cherry picked from commit 60a91537f7ea1225b5ca67f6dd9ef358b33939da)

lib/features/email/domain/extensions/email_header_extension.dart

@@ -0,0 +1,7 @@
+
+import 'package:jmap_dart_client/jmap/mail/email/email_header.dart';
+import 'package:tmail_ui_user/features/offline_mode/model/email_header_hive_cache.dart';
+
+extension EmailHeaderExtension on EmailHeader {
+  EmailHeaderHiveCache toHiveCache() => EmailHeaderHiveCache(name: name, value: value);
+}